Something that I’ve recently been trained in the use of through work; a bone injection gun.
It is what it is; you get a large bore needle with a pin through its centre, driven into your bone, preferably just under and to the inside of your knee on that flat area.
Yea, that one you just felt for.
Needle and pin go in, pin gets removed and fluid/medication/pain relief go in to the vascular core of the bone.

I have such a cool job…

Motorcycle safety gear, I’ve tested quite a bit myself but it wasn’t scientific, unless bouncing down a road while making a stupid face and avoiding your 180kg plastic and aluminium travailing companion is scientific?

Car safety devises before crash test dummies.
Any new medical procedure.
BASE jumping.
Shark cages… the list, it could go on and on…

A casual stroll through the lunatic asylum shows that faith does not prove anything. Friedrich Nietzsche